{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758948544",
    "entityType": "Track",
    "nonce": "0x5ef1370b618fa030c4aea3ed38fc3fbd7014dac89e9012a904713cf3f9f43cc8",
    "signature": "0x389dc5179f66b6c6834f97fd38364f043f999fe9fcc60a3db09acb7fa7a0b1624672e83e75617be2e9838e4293540bad1c4dc7dfbdce8dc4506002ae3aa24ca11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}