{
  "manageEntity": {
    "action": "Save",
    "entityId": "1214825851",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf3cbcb8cc2b8c91ab890f4e26ba900f76c8aae5a78a5183707aa8338ffc49fc7",
    "signature": "0xfdc58e73a5a7c63e18a252571dfbfa2621ba2247012d1093246aca9be279400014db9f1f55a62dbdf7a49bc66f47d1ccaa627856cc6369af942a069ff32286991b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}