{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4390af73d308aa0670607950a64c3fffa14f4c6e744a2d1c1b7a324d0f55785f",
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    "signer": "0x3D7DD1f4d5D29bb054fcB0E9f4A2eA344413fbc6",
    "userId": "162601604"
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}