{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x698d3f637c506363306ae67763cc7a02b2c8a82cc1b2f4ffe6f80217cc6faffc",
    "signature": "0xe4954956304cf80e3a422587169b23207918f80a68794a2c797f1d3679aeeb5b3aaf81f2d7e7470a64ceae03d1ba6efcaa4afbdac2152edfbe82f38cb9f30aa21b",
    "signer": "0xCbeD07e86835F78Aaa98F4139515996B2714e0f1",
    "userId": "973874643"
  }
}