{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc92bbfa638f532ece5f1b97af1843868f9a0fb0cc4613b7ba6b02c73255149ff",
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    "signer": "0x6Ff2481658CB2cAcd7591ce506C530e610D1220D",
    "userId": "228219761"
  }
}