{
  "manageEntity": {
    "action": "Save",
    "entityId": "710466260",
    "entityType": "Track",
    "nonce": "0x0642aba3481d0f2b019d8f934417c402486e0df5cc7fd5c0185e9f46947f197b",
    "signature": "0x90c78c8fd47b4eb585f950f2ea4ef3d96d66407ecdca316b7503462563f3b48918a45681a0b892f3465120000422d0af7e1adf2b2618d10d81ed7592ee63127a1b",
    "signer": "0xcf0A3D23E7075a75C892Dca75829b5f47Bb7e486",
    "userId": "336595220"
  }
}