{
  "manageEntity": {
    "action": "Save",
    "entityId": "802231820",
    "entityType": "Track",
    "nonce": "0x67117edf366132449223c6b37c9a036d5004815f926fa39b3053754b2f165acf",
    "signature": "0x898ac135c72de91d0a1f3b58ffe1b33684a5fa4b1ac963fdf2e169aab9ee6a02176b34437779874366863d2f5fa0fd5cb2a05542208cb8c206b91eae27cfb81b1c",
    "signer": "0xD07A680d4F48bA7Cc076c23f40870AccBbad1987",
    "userId": "16411799"
  }
}