{
  "manageEntity": {
    "action": "Save",
    "entityId": "157954396",
    "entityType": "Track",
    "nonce": "0xe7a3e30444eeee28f4948d7c914d6f0dac63cbfbda787cf53783e98961f75a1e",
    "signature": "0x0a4800a176fcdaec805f88281ea18c2f3c89a9d03cd2c0acca9f17ac1e26311d4c81d1315e63a7c3f0a9739ef15dd1ddd1a768df8f6f3819bbcb060ad286608e1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}