{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777418930",
    "entityType": "Track",
    "nonce": "0x619ff1e10093253bf76e390d8be59d568d257864e988fe9b600f76b32430a7fb",
    "signature": "0x5cbbadaafc0f631130ac329ef3d8065977fadb59d2c4b006c738a28fccbeb12f17ab3390dc8a6d579db82bc7b797c2e6ad96f348c175544a5d001ff1ba5f618a1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}