{
  "manageEntity": {
    "action": "Save",
    "entityId": "349800931",
    "entityType": "Track",
    "nonce": "0xb81d4f9080542adaf30ff7343f18aa376aba3b38bb93482c9d162c1e2942454b",
    "signature": "0x42c7cc4e50497aefa56244fa089058b7f496ae8e8856f1ec9a7594193dd95fad6acc4dfc1210cff94b4833786837953844f89efdd4e15c9aa9bb49ea475b30331b",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}