{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739684875",
    "entityType": "Track",
    "nonce": "0xf548293b852bd66222ae3bd2da8e7943bf33a5b958bdde92429e32eb7021de93",
    "signature": "0xbbaa282137ce196f38772d6f1de94cff30b141a210d717108ee6f4a8ebfca2487557b171209e699ecb8a3285ff086463e0f264c9e1764b68aaf5ba7232d426411b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}