{
  "manageEntity": {
    "action": "Save",
    "entityId": "768356989",
    "entityType": "Track",
    "nonce": "0xbe42fc151cdf5152416a8ce11c767f8c6332a5eeafb1e4084c0d162d4c3d3832",
    "signature": "0x6cb79b3045f32fbdaeefccf2d011ca2f1ce661cca852578d2bd421eddc8cf36a5196a5612ed78cfa5fefb0e0cf9f2b7ff77a6a5f9006db1fca43924a7559dc071b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}