{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100843969",
    "entityType": "Track",
    "nonce": "0xa868a24f498ce54ae1b6f121fec1162108ed7234a4eefd9be65a3d1ede799c8d",
    "signature": "0x737fce35a55e34ef0eef70f881d0031474380c3e02a93623e3ccdf682410aa9c20b2aa3b0b6f2c00b37919fcefbe672030ea2a1f590e7849927f7ca54600edc21b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}