{
  "manageEntity": {
    "action": "Save",
    "entityId": "1417775485",
    "entityType": "Track",
    "nonce": "0xdfac60f5fa1ceae47c17fae46e1c3904161470e90d4d2714ea81940a4eb04d80",
    "signature": "0xb352691db8122a601f0a134849e8d5827311621bdd11acf87efa87d5faef0b8d14504e7d6396d14e234cb51884f1c994342626aae5a86f6fa75c2446ed3d1b451c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}