{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525039790",
    "entityType": "Track",
    "nonce": "0x9ad153129c6b72eeeb53a028d39a8bdac13bed180c0f4754d3be360a1ed54fe4",
    "signature": "0x86fc0007690d760fceb3207a470fb120e2f63367f889ba9cd3cb3e974d22510f6199caba167c7cb96291ae8a9c61b494a7b5a9d281b639cc184145f0db8439161c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}