{
  "manageEntity": {
    "action": "Save",
    "entityId": "636944592",
    "entityType": "Track",
    "nonce": "0x5cf432f4795ff6732c3f4344feb64ccf5803b7b89028f25ce3ddc2e50ab0f56e",
    "signature": "0xd17808b109ff928bbe94f94fe49a08be6486bf0cf70bbe76cfc23da3a62bc6ed002fc158aaed18407ab62f91dd4138c11bbffa09a028e836ab6a0979a46bee191b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}