{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x25a08354f5d46d6fab87abcf20440f9e0c59c042d88f6a0b66cfe7a60a1aff4e",
    "signature": "0x6271790b479a2b23a1c0e1bb6bd6fd92db844501bd6780e4b171c7a4a3c36bb73428e5adc613d2f7536dd6e8e48e3085c208401dec93e70d9c6f1a15fc2db3ad1c",
    "signer": "0xEAE1c756dB1BE2AA6bFD12b24Ec5E1a5dFce3CE1",
    "userId": "324670697"
  }
}