{
  "manageEntity": {
    "action": "Save",
    "entityId": "122250194",
    "entityType": "Track",
    "nonce": "0xbb08cb554ef7e7533b17ac834d8d622b02bcc8dfa4fc7ea6832338cde9aff077",
    "signature": "0x14691d5e3b59693e2edc6e6b34add2fe4b7bd62b1acb290db48d0db01060a84f4c92f641067c37c94e7e6f68453a13a7307a280d430450c0ef66b5f02b50b37a1c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}