{
  "manageEntity": {
    "action": "Save",
    "entityId": "914279652",
    "entityType": "Track",
    "nonce": "0x95e289d3ee2117aa0680fdca71c156fcf6d478a0e12eded88f4cd464a9eb63ec",
    "signature": "0x6009c36cf30280a1b069659d9a11d41e61a420f05a62f09bcca566bda14ee0ac530a350ea3a6646503762f031e0a79bbc511156b0aed4240300320bb1567cc361b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}