{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559945510",
    "entityType": "Track",
    "nonce": "0xb65dfb52b42a0d54e745735960d04e80129ba75d834f89718a4b1d3c01d40cd5",
    "signature": "0x2ff88a9bcc2fae163d66c98b2ad20950418417b482031661c6e81e73b3ad22563b9e4d4c418044be9e4f57d4a99743c446e6160dd1e98cc25b340b656125bc7f1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}