{
  "manageEntity": {
    "action": "Save",
    "entityId": "1106548",
    "entityType": "Track",
    "nonce": "0x3d991925deec6eac6e2a70a2c138c01f9bf83acda68e03d88bb02e458bacf9ea",
    "signature": "0xa4c4bdbf38f5c900274a1af0618d3dc7daf42bc96bbdd47c2754ec10e0022fc12d7328d2d1e17ac51db0ee2e6461591d4ad32d32be997fe2e47f341f26ff491e1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}