{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123968096",
    "entityType": "Track",
    "nonce": "0x501bbf7ad7cad1a33102538b50b5929fdad5963aea746b0be4998ec0d1a15fae",
    "signature": "0x0104b5bf775c894da58cad387cdba04cc3176287f072c3817f9a1edeec36ce635e9150fcb2f547c0695129e07ea7ca939109584e94f0adf31b213c31cb20eab11c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}