{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125571222",
    "entityType": "Track",
    "nonce": "0xd2da37c2c603fa547a6ad78b56ad01a8a28cde3301144b90a3051ed6217acbe8",
    "signature": "0xd8958fa9e7f9e5ca738330813642e2ac8c22577493ac513beded4e08665c62532ff8f355af931649072a3c7368af50ac4b0ed6cbbda1a2607a3a65a091f406461b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}