{
  "manageEntity": {
    "action": "Save",
    "entityId": "1214992594",
    "entityType": "Track",
    "nonce": "0x603167aa25fd4bcc398f6b4498d615c8266dcc36c495bef1f3a4f5f35156f08a",
    "signature": "0xeb2cd6bdd235cf9fa2fbcb865744cf584208acc8ff0163589801b28f3159e18030ac5e93f6920adc31811e1d4fd68ba452398bf82255bb1f9321582c04441e451b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}