{
  "manageEntity": {
    "action": "Save",
    "entityId": "129240",
    "entityType": "Track",
    "nonce": "0x96bd16a825cf3e51669bf49b38e96cb23abc3153724b9cc93b0b7189a3b1ba33",
    "signature": "0x7ea605b1bb1b9266ccb458f8a3a35e5d630b8cad9848df40fb88adfb3bd417fb1a54c955afe873df14aa7a3f310b4ff9fa4e4d8b96587b8a8dd6c3d912b44a991c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}