{
  "manageEntity": {
    "action": "Save",
    "entityId": "341698",
    "entityType": "Track",
    "nonce": "0x4d195d19ac27a549aff1d8cf75cecaaf670a642212deb5b15f5b564cbcb06757",
    "signature": "0x9cfef82362b7f45b24dddf45a746c2d538da7fcdff0e316e0866e7db63aa462b7282ca8b77ef7aa88221864c12a7c912f623f4525e6eb1ec35e97b7b900a0c311b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}