{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb81f4113b0223a077777f8a1e7f0e63273793674bfa857281c59c4e3bbf32308",
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    "signer": "0xa11ed4b4EC56ecd7AbcCeCC2E4902590eFe35bcf",
    "userId": "873254749"
  }
}