{
  "manageEntity": {
    "action": "Save",
    "entityId": "1378824623",
    "entityType": "Track",
    "nonce": "0xe14d5c4a326b769ba18d9e245584e0f9974aea8588f8c8daeb2705f53f3866d7",
    "signature": "0x67adc2d2a29d1f577239285ddad75f2b1025f8b33b79be40740e9009615063236b586138d9ecf6d2a7fe16e727a0b9a882e800f47c9ab47ce29b127671cb665b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}