{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x843c690f63cc66a0e81c041f5a68e26f73bcfc22d7d62b94d4a0384925ed8f6d",
    "signature": "0x33d57d816ad760f9e95525b91dfe326ed1acc875040c1d5d1fef4a85a1efa33f1dbdab0b0efecbe6c0ef258eed07cef008063346c0252d7400d8f334979c15791b",
    "signer": "0x08E6A3B460FB7E1b78fa01400236e360BecDc974",
    "userId": "61085712"
  }
}