{
  "manageEntity": {
    "action": "Save",
    "entityId": "283386247",
    "entityType": "Track",
    "nonce": "0x67e8b64eafbaf74398e4fd49cadcb91def55d65fba6e18d933dcc75b7901f66c",
    "signature": "0xa5b37bc22426e53d3ee5aa6ad633c856a2bbe3e65c880f586493e8de3733d9e34772e69b21064d912765fb3862f5df784029700ecb3fc4d46c82b820a81cb4f71b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}