{
  "manageEntity": {
    "action": "Save",
    "entityId": "110448150",
    "entityType": "Track",
    "nonce": "0xee2cfc04b090b2c94af0d845538202ee4e5ed741da60c93091b3e56a5fa54956",
    "signature": "0x2a99ca4fa54436ac314bbb524b4a722dc009d17c14108d30aa797194a98481184855848656654dc719179f6ba54c9a64a35e49034e34f4456862935fa940c32a1c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}