{
  "manageEntity": {
    "action": "Save",
    "entityId": "169037",
    "entityType": "Track",
    "nonce": "0xd94f68cf71d8cbba070df6eac6acfe66141d44c9c02ed57d8565aa13c6eee3b0",
    "signature": "0xa1ae63380f285f43b96cdc7726c14a70962de242f762990e4d7f758c75613ffb205102e255fa3ea6c673d64ed38d04f0fcc1550c31daa6c157e56792353b6c411c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}