{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696723005",
    "entityType": "Track",
    "nonce": "0xe877da537a6d74c9e04d9804f39db959b2dc8cba86c16ee708c768fbd8a7c5fd",
    "signature": "0x013bfbd7452b83c6aa632833db35ec3ca1d9e2df5f915aea2bbe0838f1bafb6324bd9aee1780bcbc065becdbed0fa69185ecdec59a48c48719843e0abe46758a1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}