{
  "manageEntity": {
    "action": "Save",
    "entityId": "1779221228",
    "entityType": "Track",
    "nonce": "0xb5c8791f4660ae85cb6962622653a58ec8527474471677d16b3bd8f2f2db9795",
    "signature": "0x002eeadb70be60c8332f51628640bfd8c175df294d3db9c262c34e6c11e5cb4f6df4476188b1cf479afa676e7b94d5e4d8f43410db1253f8434b8c1c24fbae891c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}