{
  "manageEntity": {
    "action": "Save",
    "entityId": "1889192569",
    "entityType": "Track",
    "nonce": "0xb8714c4d12c3d645e499c92ac896fdae236f0650321fdf80a68792fe7835f62e",
    "signature": "0xa2dbf38f7bd7ee054596e14729a70708c4ce8e90c2890b5f90df9d34b853570f355c5f8cc2846d96cbd6c9189e267b80cd23c15206ad2e49f1f449447990ed2b1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}