{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003960798",
    "entityType": "Track",
    "nonce": "0xfedbd691fe88e237923ce64b040be280af1a906a44637a77aedac5684172e447",
    "signature": "0x57447f4ac87faff6f041cff8751f4c5c6a0b707e25923ce10a6e86721df2e8140eda9bbd9f19345de1b0fe4ae2965ecd08603dddc62910a013e909051e5bad361b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}