{
  "manageEntity": {
    "action": "Save",
    "entityId": "2139115272",
    "entityType": "Track",
    "nonce": "0x26ca342e4ce664a859a2ece6d503c9ba2c5c0985fe58706ac177af7654f586a9",
    "signature": "0xb572f911ede16951242852c7bde27da2f736f2f878df967727f065476a8dcdcc697ce59ae204eee83bf3125e0a56255b777ee4e996cd3735678eec4e3a367bed1c",
    "signer": "0x6245d270201FE6e26477efA986E8C4035bF65C71",
    "userId": "36222594"
  }
}