{
  "manageEntity": {
    "action": "Save",
    "entityId": "56735366",
    "entityType": "Track",
    "nonce": "0x3905ec7e8f4c6c5650c65daa6c1fd10c82a649d9bc87ee24f1926c94e5a51c7b",
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    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}