{
  "manageEntity": {
    "action": "Save",
    "entityId": "1008619",
    "entityType": "Track",
    "nonce": "0x1980b6c420676e5af0e51777d27973e274a047aeda9a0591c235c6c8071a86be",
    "signature": "0x4e856d3e734fdd301ef296a25664e136e73f93958658505ae19b8647464b11526d98f318dfd78052ca729defe439a8434daac9c9ea65dfd8904e2b811e529f341c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}