{
  "manageEntity": {
    "action": "Save",
    "entityId": "1946380007",
    "entityType": "Track",
    "nonce": "0x7179b62cf1d07d191a2d7246ba7d28c4059e064a62f728de17ec42e96eae3387",
    "signature": "0x07b1bbb8edb73429512fb85b1d7c4c488d9cac91f3c93b37724b2510a777b7ca5a7c7f9ce7c3c5ee64a8af9e2878fb91ce88f47de02668ec6daf0b6a7589a54c1c",
    "signer": "0x09603A9A410a583B9E14515b406FeBBc48b0AED8",
    "userId": "83237"
  }
}