{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075237461",
    "entityType": "Track",
    "nonce": "0x8d2ddf205af7734f5c7729437c52b9e26a420ba1b3edc4d6aed898a802ac186f",
    "signature": "0x6b12541fd2efbde7657a70d8cbb4f80d0f206e62c03fcab137ae73a8dfa29e41357cfa46129b31d9d483336edf65d5458b6a044dda65b74569ecd3759db2ff0f1c",
    "signer": "0x89DEf460654e7C2e2BE62C963E7Af17a92c5e432",
    "userId": "937131504"
  }
}