{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5f50c5645c12ee15fc03803d61e564bcb15fe38a2f888f6402e9cf537cbffb6b",
    "signature": "0xd8da253a84b6b4fb44ff6296c33de45a14f43196d05bb2876ef9e26f37874a0343927d6dd79ae3691cf5968b1d05e8d13bfdc6c15c6efb8eb5c1b3fdfb196aeb1b",
    "signer": "0x6988ABAFC4bDb977521bf90412539FB94CfB6D91",
    "userId": "498974169"
  }
}