{
  "manageEntity": {
    "action": "Save",
    "entityId": "1270542170",
    "entityType": "Track",
    "nonce": "0xe6074c1a1188e96e138df31bdb10e4e1d7e047520e10bec9b1e13e0101202277",
    "signature": "0x57ec72fd7dc9171ee3cd5e4f8dd12ab5bcaa8c16b1875e627bbbd0c08cbdc75c57b4185e8c7058f2e8d7888aeaeb3cb1830f56ba5f141c5e12dd8a2ad5b32f251b",
    "signer": "0x72d1844BB49347afC0912B6743298568BC02b404",
    "userId": "328108"
  }
}