{
  "manageEntity": {
    "action": "Save",
    "entityId": "606998639",
    "entityType": "Track",
    "nonce": "0x0e6696d853f90efbbb8b8708af0060e159cdca0ad3e18586e41efe95223384be",
    "signature": "0x0bc69e894e4e99180775d8675be475c2d5f88b62be2aecc89aac3b8c109a059366fbb0dfe9f977991cf3dabf42dde833db8ee630109126235f0cb50b93710f481b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}