{
  "manageEntity": {
    "action": "Save",
    "entityId": "682260803",
    "entityType": "Track",
    "nonce": "0xe4b717dfb2ce3bed33a7cf898436c894941c85a330a065c9632f84f82f1f09eb",
    "signature": "0x1fa3c9b8c831e3be56048beb93016527b93f82ad57dd5bcf0da81f9a096bc6c53b18049d0b77f408dba2329be55bea08d3335061da03a4ea00e0af5b3129aedf1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}