{
  "manageEntity": {
    "action": "Save",
    "entityId": "156975387",
    "entityType": "Track",
    "nonce": "0x5a37c1c6013813ebdf699c06024822617f44aa838b58162c5081a6fb764e822a",
    "signature": "0x10bf15140eae00eb9d8fe556692697206c3b577e308a15a17111d3479c6771b36773ca612799d1f288609d90f24193fb4840b92b5e4a1a798bbeeaa79a00e67f1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}