{
  "manageEntity": {
    "action": "Save",
    "entityId": "303013976",
    "entityType": "Track",
    "nonce": "0x92bc334874b499e2ea60d034fbf301a252782f54b7c90cdae628210d85c770c5",
    "signature": "0x3651d835da80b5db0e463936ac2781e99821d22da4d7cc5f4b85bae1416b31885a28ae9e3f9548a48c5cd7af5a044f4cd5d35e6120d2875a9d82fb95a237a2031c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}