{
  "manageEntity": {
    "action": "Save",
    "entityId": "116599291",
    "entityType": "Track",
    "nonce": "0x49400c009ac9ad136aba44f51ae557b8c3cebe5659cc76ba1f37916079f0351d",
    "signature": "0xfc3afe24e74731f64a8c2a0455e986be4367136cf14cfe3288bc04d24a224a5a7f2ec47d3dba748d97cb18a8c347c5badce2609eb11907693c52bfcc9e644cad1c",
    "signer": "0xe4bD72b949e359ED9170c28151f5E9C3c75dfCb8",
    "userId": "67242552"
  }
}