{
  "manageEntity": {
    "action": "Save",
    "entityId": "206888",
    "entityType": "Track",
    "nonce": "0x3bbc3ca26eef3c661027d44e363e39253eeebdbccf6fcf07529e7dfe758bb6ab",
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    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}