{
  "manageEntity": {
    "action": "Save",
    "entityId": "305022347",
    "entityType": "Track",
    "nonce": "0x2fd2a64994cd3015c9960c254cf4e75845c3b6b8482cc98c5f849e7c13b504ad",
    "signature": "0xf900e3962efdee29b838c6df245f7ed2dd40a72419804b2d0969edaf245079b302c8d034387e1086284b9dfc43073fd5650116eb7473f8bf6de69e3a589d53071b",
    "signer": "0xB63c8A7B935b55823f383e8f19B6207FB6b31168",
    "userId": "330374208"
  }
}