{
  "manageEntity": {
    "action": "Save",
    "entityId": "925252883",
    "entityType": "Track",
    "nonce": "0x9d543652f1376c33f530e477d62aa37a9120ea0b8975e1914747c71683be219b",
    "signature": "0xf0354cc517751c4b0eb95d4a4597dd431b30252635a14fc57a2e52dfa9cedd867ba34a2c2abc95676f5b98e2d70430a7d7a190d87055c232fef9e6a19afe4e571c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}