{
  "manageEntity": {
    "action": "Save",
    "entityId": "1051605381",
    "entityType": "Track",
    "nonce": "0xb6bdb40451cbda9bee645bc88d4adc992fdf6e7017f253aebc66c75ee9fa7c0e",
    "signature": "0xd34c2d9a8ff3aecbf33864d14e7fd67fcf62b1b7391cf6e95be4f8c8ac91e0702f831eb5bb5261d4aa3ebd560547421049c691273b5ebf3b84d4353cd3edaf941b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}