{
  "manageEntity": {
    "action": "Save",
    "entityId": "1454605187",
    "entityType": "Track",
    "nonce": "0x6c3bac0474b1841bfa7eeb4dbcc6bb8c3995c092e2755d0424497dba9f7916bb",
    "signature": "0xc34646ab6e1e37ab315a954a3aa6e918e2e810883bccc0891b35192162c1a5b00d7ef8857d7395df5994ec767c9752676e4d4ec699317b1e1566f41d325e90a61c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}