{
  "manageEntity": {
    "action": "Save",
    "entityId": "544579",
    "entityType": "Track",
    "nonce": "0x4027828e8f5d21a00cec6a0f145e96793ea5667cb801fe8d228a963964c4021f",
    "signature": "0xfc26306fb51b6e7944991704f5a9a9521ee8b611b11bed5dec2fc4d30d366ee7663824f515e253d0b8202e50f3af80cb02e54ad33e839b7f045f948cf6eff4e51c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}