{
  "manageEntity": {
    "action": "Save",
    "entityId": "939315536",
    "entityType": "Track",
    "nonce": "0x6a932731846cb1e90dfbda3b411a83f91a0fead740b6d2da890fcfaf09723794",
    "signature": "0xc7a5f014aadd3631596ecca87170318ae0a88bacb49d54134e941c96f3f480a779cde7a92648e465568aeb35b47f639f00763fe12187eafe32aff7692966bfe21b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}