{
  "manageEntity": {
    "action": "Save",
    "entityId": "1607773835",
    "entityType": "Track",
    "nonce": "0x10498fb8aec3c5dee09778e8365091930fd2bb7381e75e246a1cf067732bc971",
    "signature": "0x428ac56e94f4fa67605b045fabdc6e8ab5e5e78af58c19c7618cebf7279c0c053abcd5f4a45e09c86c56239b35a72bad596701adc8a3c7e99c435db4300e8e4b1b",
    "signer": "0xB755CddA6da08Cbad290b9528CD0dC860f9f7dd5",
    "userId": "536791428"
  }
}