{
  "manageEntity": {
    "action": "Save",
    "entityId": "1641573625",
    "entityType": "Track",
    "nonce": "0xd97dd95264417b20abc6835bb3213125e831dafa6e813f48f82d816822225451",
    "signature": "0x41b03b30e5830bac09b7c487511bdaa04078e99639b5fc9b524ed3e5ba8bfec8727f2d6c2a86b170a43f4e775865495a0fe4cd58de5b50e4d057020b7362b3b01c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}