{
  "manageEntity": {
    "action": "Update",
    "entityId": "644767279",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4d3720ecc304bcabd97db9b6dc0682dfadcca4ac1fd8b2eadf7787349edaab37",
    "signature": "0x5d17851c03fa959e9980bc7b85e93a75b7f3975bf479b4916513485d05764e3b7a26e529cce4b879955227e439ea2b0304299cf50d4cbd03cd7e2d958ecc86da1b",
    "signer": "0xf6c9943016137F3054658e7E14F51B6d271aC325",
    "userId": "644767279"
  }
}