{
  "manageEntity": {
    "action": "Save",
    "entityId": "916227013",
    "entityType": "Track",
    "nonce": "0x0742644f9d5f2fee01c5b9d6beea2cd844ee3bfc0254929f92887265d7edd544",
    "signature": "0x1855b9486372cf0421fe4d5a679d817c43ada6ac055090655a52845e45bbeda73e8f374ec4113624d5eb54348fd0f2516edb945a855d2432af78b853e9b099dd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}