{
  "manageEntity": {
    "action": "Save",
    "entityId": "324322427",
    "entityType": "Track",
    "nonce": "0x39d87b83d8ce71d90e713aa91503c6ab23007417e17fba5dca66521b14486f4e",
    "signature": "0x5f787b719ac1f710d72fa46f339052e49b91afd4361927e5b1abe715b468e2791be74cab259afe9fc46aad2796c3df67383ce8472ed90a9caf30ee698f42c1d51b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}