{
  "manageEntity": {
    "action": "Save",
    "entityId": "485483348",
    "entityType": "Track",
    "nonce": "0xcf68347e2967d6b0a07a826a4b089cb50c291f6cbc6428d35ea5e1b4f7b95206",
    "signature": "0x649a79be94a1cd0f0120753b0c654551c49a52fc352308cda7cf38003555882c061c9ce2d6cbdb487a3436a198886f25f4183b4306d1ee2916223189bc8e118c1b",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}