{
  "manageEntity": {
    "action": "Save",
    "entityId": "212033660",
    "entityType": "Track",
    "nonce": "0x684df0acf4a6eff41aa3b0e2033b108d7c4c2963e1a7d6c4b0998d745db11215",
    "signature": "0xfa15513553328e9e1068c544745cdbe1f9afdabc472801ed743d1f2a79cd8c4d0700eab89ed08fab9980e90747893cfb1d2e157043d01ba2368983d71e1bc2a91b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}