{
  "manageEntity": {
    "action": "Save",
    "entityId": "1039071101",
    "entityType": "Track",
    "nonce": "0x1f20276af368fecce73d86af258d540ce45b8664153f633b890afd3a96b8e371",
    "signature": "0xdded45a57338aab11502d5a5adcb3b32c439158f34273e469c598b7a97adf1e109cebaf7ba18e8e920cf038ce919a342c347b3edb665cb6e05b2b9c3fc9e7c0c1c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}