{
  "manageEntity": {
    "action": "Save",
    "entityId": "938454287",
    "entityType": "Track",
    "nonce": "0x0c9e4a285c4e81317db29e0b03904265b98341b82769f25b988da89e5290dea9",
    "signature": "0x16cad09597b26ea0984ced20175c08d283c54757135a1d4fc93ede97df3bd90a68204b0346c90fcb3d89290c7f6c3d46d026c1b11c07727280cf769bab36da8f1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}