{
  "manageEntity": {
    "action": "Update",
    "entityId": "555990731",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9d2edd354c59348ef1ba564c968459d3e4f92f20a58872880bbc573611c4ecb9",
    "signature": "0xef3cb2fc0022cd0ebfd931e6a03e08beac674d8121a98ee08fa12cfdd46a989118e6cdec8fe5686d5fc1ccde594c3838b0f958a239aaa11ef15f3322a6bf6cd91b",
    "signer": "0xA497E52D8457025C51a18DBA49A31e8Ec04F9d52",
    "userId": "555990731"
  }
}