{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015199923",
    "entityType": "Track",
    "nonce": "0x7d6b2285e9ae0471dd41f215157d053f6da3e2dcb96877c563c88e510660d710",
    "signature": "0x852516d7e7e0fdd3a0cf6dbbe85865a38401d38fbbb73194b945e34fd021c10b07f1223dd769cb6f7a308d6e783b32fc0952545651770a004c327c7bb7c540871c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}