{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x72d9bbf3640dc3cd60d374ab6e7162647daaea0de9ed2cc1147881e8868a3a01",
    "signature": "0x9d46a57ef5891b9e6b050d2facf20e83ab2122a3abbf10f1414afcc1ff78ace011a9eccd5f122a0cbd6e790420838202a2b9f435cedacfbc01c05c9c8e326b0d1c",
    "signer": "0x87f8538D39d3B2C6ce4d4343De4b6Aa2d5e75676",
    "userId": "138655938"
  }
}