{
  "manageEntity": {
    "action": "Save",
    "entityId": "1227203868",
    "entityType": "Track",
    "nonce": "0x801443d034c2183f66e5718abf101a99a56f67971733ba16fbd79242e6e29d6e",
    "signature": "0xcab65da180952687e3b00f6a91103974eb01c2b6bdfb50052ae5aca845f7d8621e9cb6b3339ccfe928a5231fc58fe5d4d1f156774a3d82bc826a3893c4e53d771c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}