{
  "manageEntity": {
    "action": "Save",
    "entityId": "1848316810",
    "entityType": "Track",
    "nonce": "0xd84e440418ab09a5fd1855687aac52a1922b798a3f1c4986ea683d38d3ee1783",
    "signature": "0x0ef32bc2762f44681427f954b012cd4bdec5d618839ad71872a24674e5f37efa43a47dc4e9b92c90c74d7b652dfa37b580efb93653306bcda7823aca8e9c17731b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}