{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb70b143e475f35911e92da5e88bd5e0b1057602fb98141fd546bf2fd4d672063",
    "signature": "0x3fce6ffa65c164b1070a3ce472e85afdf5fb2f8e0d77ea79cbfa27613c3ffc5104ed7d315c512d8f0f805de6a0473b23307f648a466cfcf2665486dce4d97f1d1b",
    "signer": "0x0B0763FcC4675c606b3F641C2fDfc6EBA6e89F8F",
    "userId": "707336791"
  }
}