{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1f2cefbfdc397b77c62c83d1b71f6d7ada98367db46e203b3cfeb704608c5ac4",
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    "signer": "0x67CbBb7102908f84edfcb1856bC9ED2FAF82ae7f",
    "userId": "691446572"
  }
}