{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817554841",
    "entityType": "Track",
    "nonce": "0xb6727e1754adc6ff351db3c8e5d2d4eb2be207065c7f95f218d7b2ca542c1ed9",
    "signature": "0xf7d069a03b0432f743c73affae20ff2f91d7113431d94bffd01c5ca3bd1069053f7bb00c7837670b6265c37e35d4bda300a8f9e45e6e5a6b838f547184056a431b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}