{
  "manageEntity": {
    "action": "Save",
    "entityId": "1864361708",
    "entityType": "Track",
    "nonce": "0x55f92e684feb0de90ced31b0ed06500814ca15a7a5345d81853607a392c08acb",
    "signature": "0xbad58f5734ee82303a8eef3155ef5acfd37f36d4bf239385770fd630ae0e83bf5cbb33e45ca8d10f20cd5baeb47ff05490d448bbf8130b566dd8bfee7b4183281b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}