{
  "manageEntity": {
    "action": "Save",
    "entityId": "367611156",
    "entityType": "Track",
    "nonce": "0x8a50fd95c92fc47e5f7cb7bb760692bfe8a72959f718084c1c53d5f349845b35",
    "signature": "0xadee9040d6598fdc170fbf6d36016dc8ea681142fd9dd330ad2616766786217d539ad9f8e843829970ad39e0b54a0961a3f67322e64f8e7ebde5506c926d2ff41b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}