{
  "manageEntity": {
    "action": "Save",
    "entityId": "1659884162",
    "entityType": "Track",
    "nonce": "0x4dae821b0015ff9f750a44ead297a586467f55a9356ec45b43d375bb6c2a56b6",
    "signature": "0x5ec19c1d1197e06a3c6320ceae0164899ea74bf3778ab13e13ae4bd25f3d4e1a370a498114cd73bde622c819f249223e174d33855b0418a411fdb3400d9f47e91c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}