{
  "manageEntity": {
    "action": "Save",
    "entityId": "1643672901",
    "entityType": "Track",
    "nonce": "0x895cf24f07e606dd30a34ac750c5f8ef7fe1d2c57ba5b7e876d956331dd60789",
    "signature": "0x2312d318733a238d1a204206fc51f0cf91b9d6a47f770cae2b127836850fdcf53de2e30565909ec8b6c7b7021c69e448e5917c4f9d0e0d7cd5d6e0056b69bb241c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}