{
  "manageEntity": {
    "action": "Save",
    "entityId": "1374686962",
    "entityType": "Track",
    "nonce": "0xf980b1c8d87105ea0e6f99d82b627b7183bd62fb9b25abfa272100f9b46a171e",
    "signature": "0x565bd157a2e92d44d737e690c5c6dfaf833fd6afbc3d9faa0b01722c00901fb1424fa0aeee443a4110f36601d0d83d036807d6504f03060d39dcd219644e9f911c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}