{
  "manageEntity": {
    "action": "Save",
    "entityId": "21442504",
    "entityType": "Track",
    "nonce": "0x7af46033b415f779a259285caa232fb9ff360c66c22784daed983a69ab972308",
    "signature": "0xf372d1a66e3fcec9d42e059a0d215977a3e56e37a4cb1ce003c43d93292cf589251e4d0d24667ad95d0004d46ad1d95c14b4e05a879829e56088dff16523bcfc1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}