{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401234782",
    "entityType": "Track",
    "nonce": "0xc1b7e2e856f1ed314282979c1ba732a0bf6f2f8a0c479f02664509ca06f091bf",
    "signature": "0x3ac34578db2b087f13d78c5038c9772993858ebec49f0d69e7d679c470777c5c19c220c027176afcc5796ae0f8f6adb0ca1922c4e7e4b3a3746cf72dc77626fe1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}