{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021988889",
    "entityType": "Track",
    "nonce": "0xf69cbcec543b38d2c91eede00294e6de6bf407bc7909bd0a6f809454360857cc",
    "signature": "0x6432bc05c30bbf389994e5597c459405041735f3506582a106e9167014c1ad320737a7163e90a1f7de2a2db336501407babb83da2ee2c0722ce42688e643e7831b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}