{
  "manageEntity": {
    "action": "Update",
    "entityId": "753406205",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera2l5l6c46bhdlb2msti6f3k56bwdul4hcssltpvtesdpmdus5qvxa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":59672028},{\"type\":\"playlist\",\"playlist_id\":1761382508},{\"type\":\"playlist\",\"playlist_id\":34219529}]}}}",
    "nonce": "0x0920ff48510f5d8d19ab1731eaf1746b7abb3d4f335a0fe85341fbd7b92a5e07",
    "signature": "0x67be441c6c2d1a7e13089c4c0e4376d0cf49d3955da00c0fa80b01612f55d80852cc7c7be83735f48c81c2d9777637c725a70917cbbede9ff98b20e216551a271c",
    "signer": "0xA78Fd746fAA824dCb68b68CC13fA9812a1ff2069",
    "userId": "753406205"
  }
}