{
  "manageEntity": {
    "action": "Save",
    "entityId": "242159996",
    "entityType": "Track",
    "nonce": "0x7a0ef63e5716a5c7a120996e4f8696629490e543c32eb043b51176dae39cfca0",
    "signature": "0x3352c10a5f4d7ff0a63067d5dc19f49cc5f21587b64e47bd5b45aefc47e5b7041352631f12544916c71369f0879898520d8cd7c49f73aeab0ba76dc5336e1bc71c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}