{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4ad2d8590cd13bfa4106a80493e84003a8c11df84a227af2a5a164e432815f2a",
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    "signer": "0x2B5A6e68Fb7ac6848A0b0f0231759EF6D0053E2d",
    "userId": "129688618"
  }
}