{
  "manageEntity": {
    "action": "Save",
    "entityId": "294542298",
    "entityType": "Track",
    "nonce": "0x5d90fed90141c0a0a02a1afce11ad5ddee2acb41962c0efb8ab29ce0f30417dd",
    "signature": "0x1d4f7bc0d7a009842d9d7da8489d64667eefa9f7c7c1213d5f7001cbcfad929c341f602c02780c170eb22ef52b154d3da49dd1c4fff9562c84da724cb732ee581c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}