{
  "manageEntity": {
    "action": "Save",
    "entityId": "1209336842",
    "entityType": "Track",
    "nonce": "1787142575658349306",
    "signature": "0x01eb55b987ebb8017e48d83561d13f9d7acbc110c81b2439d83b4cb1e850ebd24a3660ad73e6a7e626d660c3d5a1d15243b0a9e788294f1494c971111926c01a1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}