{
  "manageEntity": {
    "action": "Save",
    "entityId": "1117403571",
    "entityType": "Track",
    "nonce": "0x4bd35324b1fc69b12895b17a28aa028adfe8add2e3c05b25ae30c4d192054db8",
    "signature": "0xe7d2f9eb6a085f56a1882dde24a49a2801eb55eb1abd303d7e89eca586864c6757bbc86ac8173147a483a2ae440fab02effb3e72a9a488457f4557b78260e0141b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}