{
  "manageEntity": {
    "action": "Save",
    "entityId": "14708255",
    "entityType": "Track",
    "nonce": "0x90e1aacd1391c9b847ad73ce0695e4007e20df10b49a874a42fb5ab8edbb3008",
    "signature": "0x66008d1a2e36d2831ae9ef262accd04c9a794d3a520065b1d0f847cd80e189183adf09b8a412c8a19041d5905ef73a17fd030386fe9009c672cf0e363559e91c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}