{
  "manageEntity": {
    "action": "Save",
    "entityId": "602291169",
    "entityType": "Track",
    "nonce": "0xbc754bc655802f2c95d124d5601617929a8f4f8d6c18631c89a39e9d7a74b94f",
    "signature": "0xbf18059d1f3311f0cf8a94c0f5a3f1f9755bb2e0d219dd46c7e1dbba7bd03b7357c62f1d22acb944a3e831d807f0f21c1ed17558457e30fa19fbb84a9b529aa61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}