{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896472651",
    "entityType": "Track",
    "nonce": "0x1334e1e27f022aaa103c10f5d769b465f1eefb041094b1dc675346e96b62c09c",
    "signature": "0xc4278f4034c775283ff0676760e53f1680119874ce9e0f439c008ed565af38b5466cfbda7332e4b36e2ffd4276431d356fd3807f0d3e10a0b57030110f9d01601b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}