{
  "manageEntity": {
    "action": "Save",
    "entityId": "539647883",
    "entityType": "Track",
    "nonce": "0xc063950e0cc8e84827111d3ba4658b820287530cf37cb39842c6af950b08837a",
    "signature": "0xce3bdea80ca72a6bba56ac9bb7f52d8a18890170523cb092c5e271382f589e2411c4244e79ad6760c2e59d2da54ea5abac660fc754a5607b8998c7724aed38c31c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}