{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x958fbb6935b15906e13e4ab809defdc38812f86fbbcee6ea03c6a2f0d02415f4",
    "signature": "0x3671390d8c91c04a7df1fdd6b8eb0ce70cda3d557b7ef9da1a36fb675dff7fc91bf62efac09d537e96605e75f2f762fb28ffaffe8a0da3c14e675249a5e333d01c",
    "signer": "0x4ab505DBD73CB27C1457E037607E5fB3B27915f9",
    "userId": "186630"
  }
}