{
  "manageEntity": {
    "action": "Save",
    "entityId": "1265384104",
    "entityType": "Track",
    "nonce": "0xce44c1495c4e77bc819f0ba5b02912792032e025042bb18b54867e047968a82a",
    "signature": "0x3edc094449251875fdf834da5c93ab928e0d51ffa3a616c4b74861f35cee6d3b5f930454ab0c33b29883fc775b7652e2d70633b725eaa5ce0d7dd12c1220a5c31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}