{
  "manageEntity": {
    "action": "Save",
    "entityId": "787832435",
    "entityType": "Track",
    "nonce": "0xf4e6fd62487755decebde2bca66b99414508ee7be03ac24800664361c54e8646",
    "signature": "0x7cec15ffaa0ab56c3efc292afe431efa5bdf2d8f03676f8ee80506a78d3d08250b6fa30e56dd17ed0187f2572331522eb34aa834ae2c66f8293a24e7534486d31c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}