{
  "manageEntity": {
    "action": "Save",
    "entityId": "130517359",
    "entityType": "Track",
    "nonce": "0xc1a2cfac142a87fb107bcebe287c6248fd2c1eb332ed38f4013dd0edfc5b4c3a",
    "signature": "0x3f1a8a27c19f14527ed85adafa17f60860a05518df5abf2a9ef504e0b5efcb4c54a2bac0b3c1e8c899187a4d46ce1ca586d65294752decbf3ccc27d9f63406cb1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}