{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458078217",
    "entityType": "Track",
    "nonce": "0x1925a5b50516c37be01483c4ace370cb76817ebaac980ad8ca73ea15461d696a",
    "signature": "0x95d348db957185fd2c76f5b03cd8acb93d834fc7bc73b8579017ae6ad61808e85cb27cb353939c08ea9519a5e9e0abfdcdbffafc91425eb90199e085244345ae1c",
    "signer": "0x8944593b36734894385F617B07cCe122F533Fa26",
    "userId": "866199149"
  }
}