{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4805cf3a4902b69992eeea3b636d0c8bfd1dc6a27864bebcbb9284c16836dc42",
    "signature": "0xeea48d55a71f444bb47e2b2707efd771ee3560c377fd8c96f9591dc19d63f6d85efe227149b943d185a4e4a5fb86cfc994801db2e45d04e0447dcce3e806f8121c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}