{
  "manageEntity": {
    "action": "Save",
    "entityId": "1754085315",
    "entityType": "Track",
    "nonce": "0x54221d75b3e3856104e1b6087e5cab460210e5dd78d504c66dc36f54375741d9",
    "signature": "0x5b0f42648b7e19e51de6b9fcc1a6f5148ae9977a11700de69a7c3c2a8789cebe710c1b3a084e7af37b30cc4042e56bf62ce38eae4d61fd2e00d99dd73aabe7fa1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}