{
  "manageEntity": {
    "action": "Save",
    "entityId": "532985275",
    "entityType": "Track",
    "nonce": "0xcb0688fd979c4456456e8425578ba1d44b8f5843321badc6e56e3699f3bf1da4",
    "signature": "0x51727240c4d1afc99b58e0064214e23388a576620fe46354d29acf3426ea12800a2eb47bea24385a2bfa2d20e70cce73daa90a6e4248b3ceb773b4541a7ace7d1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}