{
  "manageEntity": {
    "action": "Save",
    "entityId": "1680357381",
    "entityType": "Track",
    "nonce": "0x8bc4d2e0f3ff4eec28471018bd7ef7db22a6cc83fd8c5b1111022602be6dfdbb",
    "signature": "0x0fe46892b67fb2e2322e29049529d570e73b8d5de1f2bf0f7f2a84fa6b2c99816f3a9a3337d14d75c6ae1a5ae8abb5fe659b149f669f98ac4fd4b96c358276dd1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}