{
  "manageEntity": {
    "action": "Save",
    "entityId": "533899",
    "entityType": "Track",
    "nonce": "0xd0878253292aa9b9d736112e1c197af4f1be2702d1ffca4d88e1560cff43750a",
    "signature": "0x4c7e364843288e4a73b3e0006f5acb88282e9a74e5c7551f5637fd917ebc821e10c49ee29bbe527f7ac57ef45adf98619d8de52536480c8c9d909ac05927a3411b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}