{
  "manageEntity": {
    "action": "Update",
    "entityId": "523637076",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe4e273e93f1ae4fd0a4eadf809f7013a4dc1b8af68ac82841a4f478ee33822d1",
    "signature": "0x7a9a8b4116239c2ff2e2d9fd6eda38be26861a45a0097beb72a623f4f6c75a6e70f0c3500939ab7c63e69250f9758f7b9751065f6fbc6fab7f576beb95e022081c",
    "signer": "0x981318F4D2dEaD9899eEb12Da4cfA8E69C96e3cc",
    "userId": "523637076"
  }
}