{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703386543",
    "entityType": "Track",
    "nonce": "0x8cec46605086c9d48c39c48fa9f84f23a476f29acb93c43f1666e8ceaad3d28d",
    "signature": "0x44af987f489e63ec209f20bbef9aea280207cd67be5afd57e0606a9be694cdc15f72971280f23dc5141b484fee41dd6734777733411ede333512ca4f8e57120b1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}