{
  "manageEntity": {
    "action": "Save",
    "entityId": "480253",
    "entityType": "Track",
    "nonce": "0x9987cdfe7ddb634dadd7487227d4d0a64fa20006752424f4206e7b4ed911012e",
    "signature": "0x61d7f46b80670a2e9fcb3836eacc9cd114b61e32437e0b4c4519c261d48652890c72f71bc8949aee2df065115dd0c9fd41ef89608fd5e348bd829c9013bd3ace1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}