{
  "manageEntity": {
    "action": "Save",
    "entityId": "1566048765",
    "entityType": "Track",
    "nonce": "0x444c906d05bf430a212a22018137f2a8e547fcf9bab6bd1b582046444f43e7eb",
    "signature": "0xc716d0d7fe544d5ba1a7e0c8485a5ccf7b56565ef89f64ea921a2917e325000f2272b8184d67fc6bd58b9bea469ad67b9f9ffb2d02e9b950e7df44d26144cea11c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}