{
  "manageEntity": {
    "action": "Save",
    "entityId": "2002357751",
    "entityType": "Track",
    "nonce": "0x140a09ce0af66624e3ceb67ea14e89a5c9bddb6ffa92bf065d337cbd988ffcf9",
    "signature": "0x2c92afd99b198170b94bc7a8d2df3e322027fcdf4083d1a21b7faaf6e78f42cd170145e90a7f4363c0c980c4cbc6c50f757fbd838c42221bc498ecfcc8f8f8d21c",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}