{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057167509",
    "entityType": "Track",
    "nonce": "0xcea66c0f6b5aa3b79250bcf328d0623ebcab973c48731a8bc2d560d9b0eb58d8",
    "signature": "0xbff49fd435f9c5cb72bb9be70a6a799b0f2a2ce079683997f30f281d8c8f602e32b5b893aa4c7707e656b2bb5de47ccb28729fd0f2dbf6df37b035c235f83adf1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}