{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x239456480206135ff9602811f4781246bb9a48e20635706295118bb1749acc44",
    "signature": "0x4a4d9d940d8a5669bd347b31724e9a8e5d9f4a39c992591446bb37ef6c3da5d1670fecd791ffbade94134e7243b235a20d7f805369070d7b41043eb3a7296ae21c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}