{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412293896",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb058b04d615ba59fad57cf69c0c42b7f47e966b38c4c87f23680e1d928a9be79",
    "signature": "0x6cde7dfd2f4b56d5636891ca3f66ccbbd3f374fb1265e3aeece10fe7f0ce8bce62edd6f716bd551cfdd81327a2e5a79f0f59bdb01e02374584bc6cbd72aa1c2d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}