{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216431183",
    "entityType": "Track",
    "nonce": "0x732e295f5d8a4f0418f20d37d9e3fc1c5f17cc1376eeef311efab4348348d45d",
    "signature": "0x41651d5531e6770b6b945cc9f04998f0fefd297c050f67789d9bb95cce43a7591e413e1b9a240bb3d0879e8dd160a5fd2f3a90ea5cbdc5b29473e59a4673183a1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}