{
  "manageEntity": {
    "action": "Save",
    "entityId": "1712757621",
    "entityType": "Track",
    "nonce": "0x043a5b7c38b5498533d78055850261977bc7dceb56529873c251624da2bcad22",
    "signature": "0xa1098db8ad768730aad112a295ba9bf34647c251db52a75166e2b1e806d4ce352fd7e435971622b6000ccb5f683fcb4203731fa0c5537b4f40674159d56a69aa1b",
    "signer": "0x6AF1000A97C46bf2f1Ca5fF702CDA6f05B7a3f0E",
    "userId": "322992190"
  }
}