{
  "manageEntity": {
    "action": "Save",
    "entityId": "1453636651",
    "entityType": "Track",
    "nonce": "0xa13e87b2cec339d6aa6c02f61f19ae5f2ab1593bf1c4fe078fa30c943b6a121d",
    "signature": "0x68a4fbbb1b38ca814d343b51f41859a7be8bde383205d6a012617cb9005cb7a40bc69dd35f55a0a84017e3d68a4242adb357632090b1ebe1c9d6b5611a9355581c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}