{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8751e6cf6bce0e89370bad4c738a01bdf43436bc5ea22d8dc0ae7f56bb6a9482",
    "signature": "0xe32b15136b2d92e8dc034c3968767ebdf7f48e4484ca3e0fef03efbb1483d0ae1da7571fe9f90cf679ac816cf107b19bea9f3a010594cf793d780e818f49dc5d1c",
    "signer": "0x8d2a32737cceB6eec8e74b5A45b42eF2da1366a3",
    "userId": "750127834"
  }
}