{
  "manageEntity": {
    "action": "Save",
    "entityId": "1712518966",
    "entityType": "Track",
    "nonce": "0x2151738fc911cc72f611528c9f804aea49e21040f6389d77057b903e9b774c38",
    "signature": "0x862770cde8c2aea79665667efb679433f598b6863621e9c2b81917c7a4d32e1d61e2c423db2c35058e65c308c6f62410dc1e912ba3d592007e1747ac348a169f1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}