{
  "manageEntity": {
    "action": "Save",
    "entityId": "1053050",
    "entityType": "Track",
    "nonce": "0x88cf31f74df8fef22eb1f90f6794929410abaf063cd6c126c652fa5c06b905d8",
    "signature": "0x6bd6c1c1c9cf538238138aff7695ee11e2574426aa1ee55369a9bbe9e13eccc319ae4d08bc84aaa3fa4ede98a95e170bfb11e6bed6f25898d77dbc651e0f064c1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}