{
  "manageEntity": {
    "action": "Save",
    "entityId": "736869272",
    "entityType": "Track",
    "nonce": "0x687be4fd72f3797acae4bb03678b2893da991b69cbcd9b10db69b95056e800e0",
    "signature": "0x21aeae10c5092eae25b0755964ce623451f23a2f31799d007bfbad13feba6a9413553b02460e504455cd9e5397bf8a3031bc919f503e808643343a32231cb48d1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}