{
  "manageEntity": {
    "action": "Save",
    "entityId": "266945911",
    "entityType": "Track",
    "nonce": "0x132ecdff593624cc238a32069f7288bf0d74ef0a1764df2cd4b4fa55037a6025",
    "signature": "0xc042deb6ac6cf301667335288ee4fc43635d390492087354b8bb9a17fe234cd615cfc2b7ef77bf99135fde863b99f5d0f7f53fa9784f44d42103b20a309f79cc1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}