{
  "manageEntity": {
    "action": "Save",
    "entityId": "381414496",
    "entityType": "Track",
    "nonce": "0xb9b26f14177ab0242ace3653049ec2ded397025f3d0b1234802a6ef862d7e946",
    "signature": "0x08902b660aeb218f86c1d5c52855c7418a19db484857a0b25e86f23549d0b3a81f006360eefd5013ae8ca6d291fc687ba5dbd4745f28d2a73d2cbdbc75fd12831b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}