{
  "manageEntity": {
    "action": "Save",
    "entityId": "958898",
    "entityType": "Track",
    "nonce": "0x82a4544a6e9f1e7ed92baa9ef6c5c37967e09d1e0981819648d6dc1cb4df11d9",
    "signature": "0x811fc1f4f31c541e6b9f9e86c637f564668698694a95372b7219490adda802c44619e5e5a5590316bd51096b4c4fd73c4ee031d30884bb6e2937b68384ee6a281b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}