{
  "manageEntity": {
    "action": "Save",
    "entityId": "2001792458",
    "entityType": "Track",
    "nonce": "0x30a037536e87fc072d7118687504cedbc52b7f285f74ebceeebe7cf0277b4b56",
    "signature": "0x72b65bf27394167b148f7ed178dc71185099666bab05f2b5b5b22bb37f5db5ce2210b5f77ec6d2e3b4caa43c0666ef9a79ea6260f84a6b12a7773b845d70197b1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}