{
  "manageEntity": {
    "action": "Save",
    "entityId": "1558756178",
    "entityType": "Track",
    "nonce": "0xe27c762aa955f281b6918a0cd4038a9a36c842bdce36be4a40813a397e2682c8",
    "signature": "0x505b856c3552b8036c8b24d262319603dacf51cf13ab526bf1892388c5ab4beb2c5fc56d10c6ea52e4f059f949e50d223571cd4e97f54af505b7c7da68a7ed601b",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}