{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666476981",
    "entityType": "Track",
    "nonce": "0xe1eafa53caba90c14a536ffc001d586325717a45552935fb4c9ec805661a7157",
    "signature": "0x5285e5fde4dac1f220f40e1af4303b8202ad1ce8b9387975d80bf77666c9c63825b7ed6e5969a55db4ad6272f7f85c9db64f7a0284698d45cd7997f10d145b2b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}