{
  "manageEntity": {
    "action": "Save",
    "entityId": "1520632544",
    "entityType": "Track",
    "nonce": "0x700f65e9038f11ac89ae4f103e6ed3249a101e661f2b9f9282e285d6ae3b39d6",
    "signature": "0x9d10a6248a316451273bb395f3a827d9040e6ad53d8c067dcf0dcfad2086283676c95cb65eaa4dcf7165eb7b461c3b29dd1f31cbf9edd6f5be978c662328e2211b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}