{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048849876",
    "entityType": "Track",
    "nonce": "0x07fadc600aa26896b3430aae6aff9908d89d5a5cab6eba854574beb1fe7e6dac",
    "signature": "0x5dc08d373425524b4faa3910017354c81a7699436bc66bf7e76dbbf5ae7f7fb61083f356f3a9382e43e4a66168730d0ee71c494c2456c84b685067c11c54f3461b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}