{
  "manageEntity": {
    "action": "Save",
    "entityId": "120712118",
    "entityType": "Track",
    "nonce": "0x499fa5f5a2fd760e7bd41d2158df13efb6bec4cf670918e39234cbc245da603b",
    "signature": "0x07193e47fab5261a255f4d1a87a9928258b0af7c8839a583ff2d40498beeb1ca042056803c26454644e5d0a77bee183f6206f2d3f684b84291a24835a49a440e1b",
    "signer": "0x9c3B758948f27dCECee5f39438D5E15d6e82FB67",
    "userId": "283863311"
  }
}