{
  "manageEntity": {
    "action": "Save",
    "entityId": "334034278",
    "entityType": "Track",
    "nonce": "0x4f10873d1ac2d7a09e1b2122f0c88d78d2b1c5278066f0e2a57057bf0c0888d0",
    "signature": "0xfa71cb4f385e907d8e2716e88981dee6fc8b36628ec9304ce02b6e3ae8336ad64b5f669d5755abfc05283a8564795e260964674405691bf9d15c8f2f1ba408191c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}