{
  "manageEntity": {
    "action": "Update",
    "entityId": "326767831",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierags5alrtl65rd7otrf4fkyleqwgid2xlvpqahp2qpkzgfbahlwzwq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1448541809}]}}}",
    "nonce": "0xa023fb8c283e3d9f6f3efc5ba16d8e5e5129edd276e527d6c8362b1e3ea5ed02",
    "signature": "0x4f244c1f2420beed4eb7522504f15e92aef47fc225e785b62c2d57fc9aab833a65f0e1bf3938ce1730f932bcbf3ebefdb5126c87df63122f4a905a18c9f6bcda1c",
    "signer": "0xA21b45B80cA89EdC19365C5f9B50d82051294192",
    "userId": "326767831"
  }
}