{
  "manageEntity": {
    "action": "Save",
    "entityId": "480461",
    "entityType": "Track",
    "nonce": "0xdb05dac6aeb25d219748a3eff8d8f3eaca56c59a0f23f64dd1c0464d6f489e7e",
    "signature": "0xe15cae6963e489137d4e9c43d55139ad714656893356b93790b3fc98cb82597c0f29ad5b976a0fd64d17239d954e19a22d916755ec6fec03f3d8b081f74aca901c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}