{
  "manageEntity": {
    "action": "Save",
    "entityId": "1862485294",
    "entityType": "Track",
    "nonce": "0x418ed3b262a13be71b5654e57fa342de2bac4d711d3ca80a54bc93c42cd60e3b",
    "signature": "0xf241f5675fed3f27deec7f964252e926222d3735a163fe46bf94a5364de09cc217acbbaccd71cc221b2641a0366cdc1920bcaa5a00df3e7aa81d9fef348f56b81b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}