{
  "manageEntity": {
    "action": "Save",
    "entityId": "1541329732",
    "entityType": "Track",
    "nonce": "0x9315c03783b5f87b9ce49e6d7669e683ebab010f93b3dc2da5fab9e4be939d8d",
    "signature": "0x7c5b7d55491b691a6dc5e9a5ad9604cf37760b5181dc4c8b252f2d725f1cd0a32595e5ab9895b304dc67961941b8acfba619f4c164d08d642840582ea5002c4e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}