{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048773202",
    "entityType": "Track",
    "nonce": "0xb835218d739c4d63839144dc05efb8e000d6e198f5d5aab5ce8b55634067da27",
    "signature": "0x3e46fff41291984252dac95d5d83d7548013ecd058c65bba8dee95d767a2abbc224a3b2ab0392635c7ab072253615258782f369fae22d87896c9e7f6cbd6bb3b1c",
    "signer": "0x14fa63A530B7d9254d20B110AAc25ABF49fbfa9d",
    "userId": "182428"
  }
}