{
  "manageEntity": {
    "action": "Save",
    "entityId": "715113416",
    "entityType": "Track",
    "nonce": "0x5a1aa661094e4aa8cec064639a7a01c4646388fa6316507c961b5f124e5201a4",
    "signature": "0x49ebc8442330ff8817d22de6cf7dbba4b284a7c2b850034ead973397caeef36c7839f728a2b404ae6a5133ed47169d6618635f91b21edd2c8743b85d0671b47f1b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}