{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc0ef9873ab88d8fddc2099ade6688c7f0acfeff6fae4d3c1a0bd6e1ca5d5b89c",
    "signature": "0x396769129ef19ab4957440e08b0634c5862c69382bdb606b9e3d2e9108ffb7dd2d507629762366da0136e2be2a23dcc6d3b2b7afc5d878407e7a1a086b6a21a41c",
    "signer": "0xF90274a9681f47A7a6067404D7320A739B3BF916",
    "userId": "941420599"
  }
}