{
  "manageEntity": {
    "action": "Save",
    "entityId": "418636498",
    "entityType": "Track",
    "nonce": "0xc33c529b3023a90f69b3f329a8cf565a9b9b8b2d9d347720b08570b13f17f711",
    "signature": "0xddda10e1a8cf78bd6e4023a023a3959a15c11a78f46676dd68aba852c346d6af2c079ee3f945911f09882afebc7159c73092cd4adff0fd835533ff428b11b0001b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}