{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb9d93ef5a6dd596d1fbbe495ccbaaf5fd4a4a1039a052310ae8c20391b057397",
    "signature": "0x602748c52eb7cfe743350c7f5096d438816a6eceae85ff7fd6f0fc357be9fa0d0d62f17ac7694f8788cf20c20a9d388842529cb159c617e122b442a3788840b01c",
    "signer": "0x69A2765596Cd514f6fFC6aD1D91cf7dbFCcA61Af",
    "userId": "15311889"
  }
}