{
  "manageEntity": {
    "action": "Save",
    "entityId": "104568",
    "entityType": "Track",
    "nonce": "0x57df3ad27d8d7cc4d1650cf62e0f9a3787ddbad7e760cda6ab44712e178dc217",
    "signature": "0x662387bef1f011cce8d1e24c26e5fd7c96f41f2c2aff5f46c15a28c3a69ce94804e1b94649b4f80f9a3b33f19dc6eabcbf370662016d8bfbad516b44d81b7bee1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}