{
  "manageEntity": {
    "action": "Save",
    "entityId": "712289",
    "entityType": "Track",
    "nonce": "0x0f96172ac3ceb30ed0bb8222f8b191dceed13c215926d79558b48db9f230ef3e",
    "signature": "0x8eb3b2898d592e923780eaf15a612e15dcf7adef8b1b24df2cc3b7594083b20d27b7c0a5c5c17a91bf39dd2d5b0d5fd3fb4f4e62fa03c60a46a4a56df5d9f8cc1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}