{
  "manageEntity": {
    "action": "Save",
    "entityId": "693627",
    "entityType": "Track",
    "nonce": "0x4868995711eec8d2d3fac98c36935fa677e71e2958f2763cf63fdcc472c1c9fe",
    "signature": "0x69c215c0e81fdf5d367cd0c51d877ea2a352f087101bc96e7d1f28902bacea9f084834b8cb5d8c2140cab426633cb3838984eadc17f28ab59ce85e0d6731eed31b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}