{
  "manageEntity": {
    "action": "Save",
    "entityId": "1539115212",
    "entityType": "Track",
    "nonce": "0x945def9a14417975cbd5b20cf79c2aca12413363b6977df8c9f8347a7e2aa62d",
    "signature": "0x1108e09140bd97d492a4c331c8770b8e3cc0a73cc50a3a527096046da0fdb00b5ed0852a9bb5439fb9350be10c03bf542927ea351c6942eb127077641bca875d1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}