{
  "manageEntity": {
    "action": "Save",
    "entityId": "594352068",
    "entityType": "Track",
    "nonce": "0x6ec04ea6aefeae2e74b940514fa827609b3b2a9f70a6c4f01c43eb5862707c9f",
    "signature": "0x69a7dd8734263faf3563a265cb3452f3cb914426c09e5478e53c5596a1c756b061d7067067084607c896bb5cc6cc77be4cb0fad4a1967b4bb5073145a27ba2471c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}