{
  "manageEntity": {
    "action": "Save",
    "entityId": "2147276043",
    "entityType": "Track",
    "nonce": "0x61ca0a1bc6b5880bf87bcc2247070a705ee9ce9563fff813e6f29ba53f5445a6",
    "signature": "0x269b64ce8367367da9fe1b7e8e858710c9624663ca38a3353d34bfa7593cb1c60be2e44f0d1737a8f2b864b42f4429903e320eda4478f2bc83930de5073971311b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}