{
  "manageEntity": {
    "action": "Save",
    "entityId": "702644547",
    "entityType": "Track",
    "nonce": "0x205fe17e190777dd7218b738775c18360f0b053def094891bab3421dcf80eeb0",
    "signature": "0x3e55804fad68b678ccee04f86e3d0f9bc664f27859497b77c2cae24c4beb56356f246625f28ac5935b4d9b385310098d2c72a2efc9ebe758d74e8373a50045ef1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}