{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x278f56cb728f964b54f94a1325ee5da34f282152d25dca3ea3658f8c91e685ca",
    "signature": "0x442d76bfaee2152246171cc38bf2dc0ab28b2bdcd25b9d19fa9426ea9203e9d77b108c848b163f44219877cd2adee7bbc3cbb579344705dab46ebd7e12308adf1c",
    "signer": "0x082877c3B285FBD758100ABd141Af3936F42739a",
    "userId": "674745869"
  }
}