{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699858327",
    "entityType": "Track",
    "nonce": "0xa9604965b6bb3d955512a435f0a79386684733f1301e52551401837fb0b89d4d",
    "signature": "0xa20e22d86d48a8f54827d02812d8836356c650e9ce0a3ef377dc18cda351f461250fb9856b2c2dc445e657b558e1d3a0d3571daf3963ec7501a07d36328435671b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}