{
  "manageEntity": {
    "action": "Save",
    "entityId": "1568368217",
    "entityType": "Track",
    "nonce": "0xaa567d8e717b78f2269702f8149c1f7216dcd02e443724a8bd0c102e71674211",
    "signature": "0x8a9479c0a28ba8237ec9dd8daaf6b8240780cd96485625175fce090f79c867330a0972c9c0c9769cc40f8929173a1e1572f65ba59c7b98c178bc107b572c81a81b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}