{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043754816",
    "entityType": "Track",
    "nonce": "0x39888ac207924d296336b3b4884ff70e2896f7939d5d3e154d113c4cf49a905f",
    "signature": "0xdcc490b9106d55a357c9fd685cd0775466d625f02743257d07d5a8d199c71919253809b54a22d73af4432622961736c9b6d731a414579f5a1180a3d5e0276fe71b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}