{
  "manageEntity": {
    "action": "Save",
    "entityId": "1651549674",
    "entityType": "Track",
    "nonce": "0xe398e6481b0c203c77cca27543787d26f4280f60f4e0bbb732e5f3caae74b9c5",
    "signature": "0x37a8edbe2a14e0044ac2700930d8635762f9b2e50898b55c4aed0de52b5c120c1126804e2fdafb162ff81cc69529aab2ffe1b5bdce85b29ed0b780c5f3b2cd1d1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}