{
  "manageEntity": {
    "action": "Save",
    "entityId": "617299381",
    "entityType": "Track",
    "nonce": "0xb08a684d75bb9728271eda42bd9e1e83f5e9961fd4c0be4fd251ce5340c03503",
    "signature": "0x84da8ed27cf42b6ee4f813fe09ee973656334bf6404a34d8c129df06c11fc4590a0daf08b60bea11f1c554b9dd6e4c36d3243fc2724868e74fbc04beeb02cbc01b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}