{
  "manageEntity": {
    "action": "Save",
    "entityId": "181248912",
    "entityType": "Track",
    "nonce": "0x02de71bb9f0230c2fef864851e36c191f96d3a4d409d92a2018f5633ab79f5c6",
    "signature": "0x8a2088826a796694a0d8ae50b678f4aaecbbcb0c9db05f7e03ceebc51b38b8d05dc1cfb36022e8a5a9820122f6d98bcd38b09e6644f0c59c718e1262f43d8b961c",
    "signer": "0x8DF20c419C0a681c95c424985402eEe31981b6Ee",
    "userId": "376291"
  }
}