{
  "manageEntity": {
    "action": "Save",
    "entityId": "954468",
    "entityType": "Track",
    "nonce": "0xed09ad608a4a626648376f2886b111a87e51e385d80477675b3f20beef8ba6cc",
    "signature": "0xf324b4d095060414e86f9d5aca5a8a29e1bf0f4ccdfe923739ea9819346bc521416e410427f54cb2d0b34b736df773285eadb3c56cd803e6be50188df415ec3e1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}