{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe2ff98f4b1916bca47a7be75523985ce5b2b7f10ec5815d96f2bc9c74631ec4a",
    "signature": "0x5d64963ac23aa66e4fd7fd18a2da42738cee1d5603a161a411792591074ef1327057cafd2caecddd70cbe38a306366c9b187090c305ff56c936a3bd2c66945dc1b",
    "signer": "0x26A3Bf55EdB37b3C23aFCBf7f977b73Ab5111f80",
    "userId": "614565620"
  }
}