{
  "manageEntity": {
    "action": "Save",
    "entityId": "963264769",
    "entityType": "Track",
    "nonce": "0x7626ee9e48abe7aa68903cc65c494f503365de0b06f3ab81a0c013ce459b1373",
    "signature": "0x56f52224fc95f717ab9e5faeb922f63e5a5337e8e3365d84789cb5f841f1826c296188dd24901c04b63ce2160ba3ac4c418af614028ac79d48ef6daf193ac60f1c",
    "signer": "0x0Cb8508DC22f3eC228338F94fB8B4063F7418EDF",
    "userId": "95478297"
  }
}