{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408547853",
    "entityType": "Track",
    "nonce": "0xb18ef2837de4bcfac41d02853af0543070088c03431059e6d90427f8874197f9",
    "signature": "0x636ad2ab1f936300ee755a5f859da94e99c3997c93f093005a436314e4c134ba50ef32f2b066af9a8a6e6534e2f6c87759e34f0f2b80a8742804761de187651d1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}