{
  "manageEntity": {
    "action": "Save",
    "entityId": "1003949316",
    "entityType": "Track",
    "nonce": "0xbf0c330b6910fb4eb464c9f83849d12571faf1955c839f6e9662222ae4596037",
    "signature": "0x2f1f84108e93c2e36cf213245e6170e989c3cd62559f7c650b6789d8b0a3f37c09909f2e75796af10cb6dce91d653de25af1dbee3dcce44334c40521c25de4ff1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}