{
  "manageEntity": {
    "action": "Save",
    "entityId": "415791255",
    "entityType": "Track",
    "nonce": "0x222631cc9a110356294278f4ae43c4bccd849efd11c813ed6ca1826fad97d7da",
    "signature": "0xb878f9cc3e26c24f2056425203f2c35fa63bb167b6f5598dfe61cd906fb3867f00cde12e8a9e11c2a02635479cef2df7345d8aa39596c3512e004d59a63168861c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}