{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124578",
    "entityType": "Track",
    "nonce": "0x92940a34fd3763e6be4f8bc6bdb6a346f1c4e875483db24aa653f90e9fbf54dc",
    "signature": "0xf91fe62944308c0ca51d8c6cee63aa58be18af9e8326fbab94527fc646a3e50a43ed30f692ef3fb3653fb68f73789eba830dad68346a0198e2a141d6c54f21c21b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}