{
  "manageEntity": {
    "action": "Update",
    "entityId": "502388335",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3f06a9491df85d74e6924dd56587fd928ed23161721ad63d7781bbb2a5d18e4d",
    "signature": "0xc2b3ede8fd8c4d77747b1cb55377209ad98aa86e55226fb8a51cdd1dd209452259356b9a306794a12b2835e49a81d588cea77e98c4d881e317c1a77f05593c0d1c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}