{
  "manageEntity": {
    "action": "Save",
    "entityId": "952679644",
    "entityType": "Track",
    "nonce": "0xf44f33e7d42f919277e75fd47ddeaa39965ee5f38a422c644bd3db3d24186435",
    "signature": "0x28245f23323aea5f0ba5521ee48d7f09eea6662beafa2fe7a8a44d47c084e60910328b9c097b37c530ff02e1d0e83d660b79a634a535a4e86341ca0b467b1fe01c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}