{
  "manageEntity": {
    "action": "Save",
    "entityId": "30217221",
    "entityType": "Track",
    "nonce": "0xc707272ffb2fee8e1af3fd3a624c4b0e6c866e274251ea460de8dbb5bf794c6e",
    "signature": "0xc98375b38915732c22106e8fa5d3e515e9f74469d337bf5a646a8624ee26cdd177eb9550e1fb3ee882b4567f6eb97e934566091013b9f8d236589c81d30e0a0d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}