{
  "manageEntity": {
    "action": "Save",
    "entityId": "737029",
    "entityType": "Track",
    "nonce": "0x0d298c7f3e2d5a770b5dc561bd4cc59e722bee85e948ec86764093d8ce52c3e7",
    "signature": "0x441a9f2143675840371629cd3752e290d73851e3f092546edbd2f41ca2ae2ee11c756a8cf59c5d6a6fa2a3bd5eeb47fcc672e66e1ae8c177d8d7886d8764f39b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}