{
  "manageEntity": {
    "action": "Save",
    "entityId": "597584263",
    "entityType": "Track",
    "nonce": "0xfc129c99a988a3fee7f345b4220c0b636aaeb8c636c17b6f8eaa446d75359686",
    "signature": "0x831285aaadefc941577635bb0a198a12913f8d9fc5890951965dbacdae124698343e8cb45b1c607d59cf7b7562df409b3d249e0fdbfa8007806eb33aacc0f6051c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}